safari blocks the closure of the computer
safari blocks the closure of the computer
Mac Pro, iOS 6
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Force Quit Safari.
Press command + option + esc keys together at the same time.
Wait.
When Force Quit window appears, select Safari if not already.
Press Force Quit button at the bottom of the window.
Wait.
Safari will quit.
If this does not help, press the power button for 7 or more seconds.
Computer will shut down,
Restart.